Air Conditioners
Installation Manual
C&H NORDIC COMMERCIAL 4
Floor Ceiling Type Unit
Models:
Indoor Unit Outdoor Unit
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For proper operation, please read and keep this manual carefully.
If you have lost the Owner’s Manual, please contact the local
agent or visit www.cooperandhunter or sent email to info@cooperandhunter.com or
electronic version. C&H reserves the right to interpret this manual which will be subject
to any change due to product improvement without further notice.
CH-IF09NK4 CH-IU09NK4
CH-IF12NK4 CH-IU12NK4
CH-IF18NK4 CH-IU18NK4
CH-IF24NK4 CH-IU24NK4
CH-IF30NK4 CH-IU30NK4
CH-IF36NK4 CH-IU36NK4
CH-IF42NK4 CH-IU42NK4
CH-IF48NK4 CH-IU48NK4
CH-IF36NM4 CH-IU36NM4
CH-IF42NM4 CH-IU42NM4
CH-IF48NM4 CH-IU48NM4
CH-IF60NM4 CH-IU60NM4
1 Safety Precautions .......................................................................................... 1
2 Outline of the Unit and Main Parts................................................................... 2
3 Preparative for Installation ............................................................................... 3
3.1 Standard Accessory Parts .......................................................................... 3
3.2 Selection of the Installation Location .......................................................... 4
3.3 Connection Pipe Requirement ................................................................... 5
3.4 Electrical Requirement ............................................................................... 6
4 Installation of the Unit ...................................................................................... 8
4.1 Installation of the Indoor Unit ...................................................................... 8
4.2 Installation of the Outdoor Unit ................................................................. 10
4.3 Installation of the Connection Pipe ........................................................... 12
4.4 Vacuum and Gas Leakage Inspection ......................................................15
4.5 Installation of the Drain Pipe .................................................................... 17
4.6 Electrical Wiring ........................................................................................ 19
5 Installation of Controllers ............................................................................... 24
6 Test Running .................................................................................................. 24
6.1 Trial Operation and Testing ....................................................................... 24
6.2 Working Temperature Range ....................................................................26
7. Troubleshooting and Maintenance ............................................................... 27
7.1 Troubleshooting ........................................................................................ 27
7.2 Routine Maintenance ............................................................................... 28
Contents
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
1
1 Safety Precautions
WARNING!
This mark indicates procedures which, if improperly performed, might lead to the
death or serious injury of the user.
CAUTION!
This mark indicates procedures which, if improperly performed, might possibly result
in personal harm to the user, or damage to property.
WARNING!
(1). For operating the air conditioner pleasantly, install it as outlined in this installation manual.
(2). Connect the indoor unit and outdoor unit with the room air conditioner piping and cord available from
our standard parts. This installation manual describes the correct connections using the installation
set available from our standard parts.
(3). Installation work must be performed in accordance with national wiring standards by authorized
personnel only.
(4). If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in
contact with a ame, it produces toxic gas.
(5). Do not power on until all installation work is complete.
(6). During installation, make sure that the refrigerant pipe is attached firmly before you run the
compressor.
Do not operate the compressor under the condition of refrigerant piping not attached properly with
2-way or 3-way valve open.
This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.
(7). During the pump-down operation, make sure that the compressor is turned off before you remove
the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2-way or 3-way valve
open.
This may cause abnormal pressure in the refrigerant cycle that leads to breakage and even injury.
(8). When installing and relocating the air conditioner, do not mix gases other than the specified
refrigerant (R410A) to enter the refrigerant cycle.
If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally
high value and cause breakage, injury, etc.
(9). This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
(10). Children should be supervised to ensure that they do not play with the appliance.
(11). If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualied persons in order to avoid a hazard.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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2 Outline of the Unit and Main Parts
Indoor
Outdoor
1. Guide louver
2. Air lter
3. Wired controller
4. Wireless Controller
5. Binding tape
6. Drain Pipe
7. Gas Pipe
8. Lipuid Pipe
9. Big Handle
10. Front Board
3 4
5
679 810
1 2
Air inlet
Air outlet
Fig.1
Notes:
① .
The connection pipe and duct for this unit should be prepared by the user.
② .
This unit is standard equipped with the rectangular duct.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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3 Preparative for Installation
3.1 Standard Accessory Parts
The standard accessory parts listed below are furnished and should be used as required.
Table 1
Indoor Unit Accessories
No. Name Appearance Q'ty Usage
1 Nut with Washer
8
To x the hook on the cabinet
of the unit.
2
Wireless
Controller+Battery
1+2 To control the indoor unit
3 Insulation
1 To insulate the gas pipe
4 Insulation
1 To insulate the liquid pipe
5 Installation Paperboard
2 To insulate the drain pipe
6 Fastener
4 To fasten the sponge
7 Nut
1 To connect gas pipe
8 Nut
1 To connect liquid pipe
Table 2
Outdoor Unit Accessories
No. Name Appearance Q'ty Usage
1 Drain Plug
3 To plug the unused drain hole.
2 Drainage Connecter
or 1
To connect with the hard PVC
drain pipe
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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3.2 Selection of the Installation Location
WARNING!
The unit must be installed where strong enough to withstand the weight of the unit and xed securely,
otherwise the unit would topple or fall off.
CAUTION!
① .
Do not install where there is a danger of combustible gas leakage.
② .
Do not install the unit near heat source, steam, or ammable gas.
③ .
Children under 10 years old must be supervised not to operate the unit.
Decide the installation location with the customer as follows:
3.2.1 Indoor Unit
(1). Install the unit at a place where is strong enough to withstand the weight of the unit.
(2). The air inlet and outlet of the unit should never be clogged so that the airow can reach
every corner of the room.
(3). Leave service space around the unit as required in Fig.2.
◆
Floor type
Unit: mm
>600
>1000
>300
>600
>1500
◆
Ceiling type
Unit: mm
>300
>600
>600
>1500
>200>2300
Fig. 2
(4). Install the unit where the drain pipe can be easily installed.
(5). The space from the unit to the ceiling should be kept as much as possible so as for more
convenient service.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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3.2.2 Outdoor Unit
WARNING!
① .
Install the unit where it will not be tilted by more than 5°.
② .
During installation, if the outdoor unit has to be exposed to strong wind, it must be xed securely.
If possible, do not install the unit where it will be exposed to direct sunlight. (If necessary, install
a blind that does not interfere with the air ow.)
(1). Install the outdoor unit in a place where it will be free from being dirty or getting wet by rain
as much as possible.
(2). Install the outdoor unit where it is convenient to connect with the indoor unit.
(3). Install the outdoor unit where the condensate water can be drained out freely during
heating operation.
(4). Do not place animals and plants in the path of the warm air.
(5). Take the air conditioner weight into account and select a place where noise and vibration
are small.
(6). Install the outdoor unit where is capable of withstanding the weight of the unit and
generates as less noise and vibration as possible.
(7). Provide the space shown in Fig.3, so that the air flow is not blocked. Also for efficient
operation, leave three of four directions of peripheral constructions open.
Units: mm
＞500
＞500 ＞500
＞500
＞2000
＞2000
＞1000
Fig.3
3.3 Connection Pipe Requirement
CAUTION!
The maximum length of the connection pipe is listed in the table below. Do not place the units between
which the distance exceeds the maximum length of the connection pipe.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Table 3
Size of Fitting
Pipe(Inch)
Max.
Pipe
Length
(m)
Max. Height
Difference between
Indoor Unit and
Outdoor Unit (m)
Drainage
pipe(Outer
Diameter × wall
thickness) (mm)
Liquid Gas
CH-IF09NK4 CH-IU09NK4 1/4 3/8 20 15 φ17×1.75
CH-IU12NK4 CH-IU12NK4 1/4 3/8 20 15 φ17×1.75
CH-IU18NK4 CH-IU18NK4 1/4 1/2 20 15 φ17×1.75
CH-IU24NK4 CH-IU24NK4 3/8 5/8 30 15 φ17×1.75
CH-IU30NK4 CH-IU30NK4 3/8 5/8 30 15 φ17×1.75
CH-IU36NK4 CH-IU36NK4 3/8 5/8 30 15 φ17×1.75
CH-IU42NK4 CH-IU42NK4 3/8 5/8 50 30 φ17×1.75
CH-IU48NK4 CH-IU48NK4 3/8 5/8 50 30 φ17×1.75
CH-IU36NK4 CH-IU36NM4 3/8 5/8 30 15 φ17×1.75
CH-IU42NK4 CH-IU42NM4 3/8 5/8 50 30 φ17×1.75
CH-IU48NK4 CH-IU48NM4 3/8 5/8 50 30 φ17×1.75
CH-IU60NK4 CH-IU60NM4 3/8 3/4 50 30 φ17×1.75
(1). The connecting pipe should be thermally insulated properly.
(2). The pipe wall thickness shall be 0.5-1.0mm and the pipe wall shall be able to withstand the
pressure of 6.0 MPa. The longer the connecting pipe, the lower the cooling and heating
effect performs.
(3). The pipe wall thickness shall be 0.5-1.0mm and the pipe wall shall be able to withstand the
pressure of 6.0 MPa. The longer the connecting pipe, the lower the cooling and heating
effect performs.
3.4 Electrical Requirement
Electric Wire Size and Fuse Capacity.
Table 4
Indoor Units
Power Supply Fuse Capacity Breaker Capacity Min. Power Supply Cord
V/Ph/Hz A A mm
2
09K~60K 220-240V~ 50Hz 5 6 1.0
Item
Model
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Table 5
Model
Power
Supply
Capability of Air
Switch(A)
Minimum Sectional Area of Power
Cable and Earth line (mm2)
CH-IU09NK4
220-240V
～
50Hz
13 1.5
CH-IU12NK4 13 1.5
CH-IU18NK4 16 1.5
CH-IU24NK4 20 2.5
CH-IU30NK4 20 2.5
CH-IU36NK4 25 2.5
CH-IU42NK4 25 2.5
CH-IU48NK4 40 6.0
CH-IU36NM4
380-415V 3N
～
50Hz
10 1.5
CH-IU42NM4 10 1.5
CH-IU48NM4 16 1.5
CH-IU60NM4 16 1.5
Notes:
① .
The fuse is located on the main board.
② .
Install the disconnect device with a contact gap of at least 3mm in all poles nearby the units
(Both indoor unit and outdoor unit).The appliance must be positioned so that the plug is
accessible.
③ .
The specications of the breaker and power cable listed in the table above are determined
based on the maximum power (maximum amps) of the unit.
④ .
The specifications of the power cable listed in the table above are applied to the conduit-
guarded multi-wire copper cable (like, YJV copper cable, consisting of PE insulated wires and
a PVC cable jacket) used at 40°С and resistible to 90°С(see IEC 60364-5-52). If the working
condition changes, they should be modied according to the related national standard.
⑤ .
The specifications of the breaker listed in the table above are applied to the breaker with
the working temperature at 40°С. If the working condition changes, they should be modied
according to the related national standard.
⑥ .
Take 2 pieces of power cord of 0.75mm2 as the communication lines between indoor and
outdoor unit, with their longest lengths of 50m. Please select the appropriate line length as per
the actual installation conditions. The communication lines can not be twisted together. For
the unit (≤30K), it’s recommended to use 8m long communication line.
⑦ .
Take 2 pieces of power cord of 0.75mm2 as the communication lines between the wired
controller and the indoor unit, with their longest lengths of 30m. Please select the appropriate
line length as per the actual installation conditions. The communication lines can not be twisted
together. It’s recommended to use 8m long communication line.
⑧ .
The wire size of the communication line should be no less than 0.75mm2. It’s recommended to
take 0.75mm2 power cords as the communication line.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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4 Installation of the Unit
4.1 Installation of the Indoor Unit
4.1.1 Indoor unit dimension
WARNING !
① .
Install the indoor unit in a location which can withstand a load of at least five times the
weight of the main unit and which will not amplify sound or vibration.
② .
If the installation location is not strong enough, the indoor unit may fall and cause injuries.
③ .
If the job is done with the panel frame only, there is a risk that the unit will come loose.
Please take care.
Fig.4
Table 6
Model A B C D H
CH-IF09NK4
1220 225 1158 280 700
CH-IF12NK4
CH-IF18NK4
CH-IF24NK4
CH-IF30NK4
1420 245 1354 280 700CH-IF36NK4
CH-IF42NK4
CH-IF48NK4
1700 245 1634 280 700
CH-IF60NK4
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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4.1.2 Preparation for Installing the Indoor Unit
(1). Open the air inlet grille and the screw cover, and remove the screws.
(2). Release the claws in the 3 places indicated.
(3). Release the center hook and remove the front panel.
(4). Release the claws in the 2 or 3 places indicated and remove the electric component cover.
4.1.3 Indoor Unit Installation
(1). Determine the location of the hanger through the paper template, and then remove the
paper template.
Paper template
Anchor bolt
Fig.5
(2). Insert the anchor bolts into the drilled holes, and drive the pins completely into the anchor
bolts with a hammer.
(3). Remove the right and left side panels.
(4). Put the hanger bolt into the clasp of the indoor unit and tighten screws on the hanger to
prevent the indoor unit from moving.
(5). Reinstall and tighten the right and left side panels.
◆
Floor type
Wall
Left side panel
Right side panel
Paper template
Fig.6
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
10
◆
Ceiling type
40
Ceiling
Suspension
bolt
Spring
washer
Nut
Nut
Hanger
Right side
panel
Left side panel
Fig.7
(6). Adjust the height of the unit to make the drain pipe slant slightly downward so that the
drainage will become much smoother.
4.1.4 Leveling
The water level test must be done after installing the indoor unit to make the unit is horizontal,
as shown below.
Horizontal tester
Fig.8
4.2 Installation of the Outdoor Unit
WARNING
① .
Install the unit where it will not be tilted by more than 5°.
② .
During installation, if the outdoor unit has to be exposed to strong wind, it must be xed securely.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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4.2.1 Outdoor unit dimension
D
A
B
C
E
Fig.9
Table 7 Unit: mm
Item
Model
A B C D E
CH-IU09NK4
848 320 540 540 286
CH-IU12NK4
CH-IU18NK4 955 396 700 560 360
CH-IU24NK4
980 427 790 610 395
CH-IU30NK4
CH-IU36NK4
1107
440 1100 631 400
CH-IU36NM4
CH-IU42NM4
958 412 1349 572 376
CH-IU42NK4
CH-IU42NK4
CH-IU48NM4
CH-IU60NM4
1085 427 1365 620 395
4.2.2 Condensate Drainage of the Outdoor Unit(Only for the heat pump unit) (Fig.10)
(1). It is required to install a drain pipe for the outdoor unit to drain out the condensate water
during heating operation. (only for the heat pump unit)
(2). When installing the drain pipe, apart from the drain pipe mounting hole, all other holes
should be plugged so as to avoid water leakage.(only for the heat pump unit)
(3). Installation Method: Insert the pipe joint into the hole φ25 located at the base plate of the
unit and then connect the drain pipe to the pipe joint.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Bottom Drain cap
Drain pipe
mounting hole
Fig.10
4.3 Installation of the Connection Pipe
4.3.1 Flare Processing
(1). Cut the connection pipe with the pipe cutter and remove the burrs.
(2). Hold the pipe downward to prevent cuttings from entering the pipe.
(3). Remove the are nuts at the stop valve of the outdoor unit and inside the accessory bag of
the indoor unit, then insert them to the connection pipe, after that, are the connection pipe
with a aring tool.
(4). Check if the are part is spread evenly and there are no cracks (see Fig.11).
Fig.11
4.3.2 Bending Pipes
(1). The pipes are shaped by your hands. Be careful not to collapse them.
Fig.12
(2). Do not bend the pipes in an angle more than 90°.
(3). When pipes are repeatedly bent or stretched, the material
will harden, making it difcult to bend or stretch them any
more. Do not bend or stretch the pipes more than three
times.
(4). When bending the pipe, do not bend it as is. The pipe
will be collapsed. In this case, cut the heat insulating pipe with a sharp cutter as shown in
Fig.13, and bend it after exposing the pipe. After bending the pipe as you want, be sure to
put the heat insulating pipe back on the pipe, and secure it with tape.
Fig.13
Pipe
Cutter
Cutt line
Heat insulating
pipe
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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CAUTION!
① .
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 150
mm or over.
② .
If the pipe is bent repeatedly at the same place, it will break.
4.3.3 Connecting the Pipe at the Indoor Unit Side
Detach the caps and plugs from the pipes.
CAUTION!
① .
Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper,
the flare nut cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be
damaged.
② .
Do not remove the are nut until the connection pipe is to be connected so as to prevent dust and
impurities from coming into the pipe system.
When connecting the pipe to the unit or removing it from the unit, please do use both the
spanner and the torque wrench.(Fig.14)
When connecting, smear both inside and outside of the are nut with refrigeration oil, screw it
hand tight and then tighten it with the spanner.
Refer to Table 10 to check if the wrench has been tightened properly (too tight would mangle
the nut and lead to leakage).
Examine the connection pipe to see if it leaks, then take the treatment of heat insulation, as
shown in the Fig.15.
Use the medium-sized sponge to insulate the coupler of the gas pipe.
Fig.14
Fig.15
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Table 8 Flare nut tightening torque
Pipe Diameter Tightening Torque
1/4˝(Inch) 15-30 (N·m)
3/8˝(Inch) 35-40 (N·m)
5/8˝(Inch) 60-65 (N·m)
1/2˝(Inch) 45-50 (N·m)
3/4˝(Inch) 70-75 (N·m)
7/8˝(Inch)
80-85 (N·m)
CAUTION!
Be sure to connect the gas pipe after connecting the liquid pipe completely.
Fig.16
4.3.4 Connecting the Pipe at the Outdoor Side Unit
Tighten the are nut of the connection pipe at the outdoor unit valve
connector. The tightening method is the same as that as at the indoor
side.
4.3.5 Checking the Pipe Connections for Gas Leaking
For both indoor and outdoor unit side, check the joints for gas
leaking by the use of a gas leakage detector without fail when the pipes
are connected.
4.3.6 Heat Insulation on the Pipe Joints (Indoor Side Only)
Stick coupler heat insulation (large and small) to the place where connecting pipes.
Fig.17
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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4.3.7Liquid Pipe and Drain Pipe
Sealed
Drain
pipe
Saddle
Fig.18
Fig.19
Trap
If the outdoor unit is installed lower than
the indoor unit (See Fig.18)
(1). A drain pipe should be above ground
and the end of the pipe does not
dip into water. All pipes must be
restrained to the wall by saddles.
(2). Taping pipes must be done from
bottom to top.
(3). All pipes are bound together by tape
and restrained to wall by saddles.
If the outdoor unit is installed higher than
the indoor unit
(1). Taping should be done from lower to
the upper part.
(2). All pipes are bound and taped
together and also should be trapped
to prevent water from returning to the
room (See Fig.19)
(3). Restraint all pipes to the wall with
saddles.
4.4 Vacuum and Gas Leakage Inspection
CAUTION!
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation! There is
no extra refrigerant in the outdoor unit for air purging!
4.4.1 Vacuum
(1). Remove the caps of the liquid valve, gas valve and also the service port.
(2). Connect the hose at the low pressure side of the manifold valve assembly to the service
port of the unit’s gas valve, and meanwhile the gas and liquid valves should be kept closed
in case of refrigerant leak.
(3). Connect the hose used for evacuation to the vacuum pump.
(4). Open the switch at the lower pressure side of the manifold valve assembly and start the
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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vacuum pump. Meanwhile, the switch at the high pressure side of the manifold valve
assembly should be kept closed, otherwise evacuation would fail.
(5). The evacuation duration depends on the unit’s capacity, generally, 15 minutes for the
09K/12K units, 20 minutes for the 18K units, 30 minutes for the 24/30/36K units, 45
minutes for the 42/48/60 units. And verify if the pressure gauge at the low pressure side
of the manifold valve assembly reads -1.0Mp (-75cmHg), if not, it indicates there is leak
somewhere. Then, close the switch fully and then stop the vacuum pump.
(6). Wait for some time to see if the system pressure can remain unchanged, 3 minutes for the
units less than 18K, 5 minutes for the 18K~24K units, 10 minutes for the units more than
42K. During this time, the reading of the pressure gauge at the low pressure side can not
be larger than 0.005Mp (0.38cmHg).
(7). Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance
the pressure inside and outside of the connection pipe, so that air will not come into the
connection pipe when removing the hose. Note that the gas and liquid valve can be opened
fully only after the manifold valve assembly is removed.
(8). Place back the caps of the liquid valve, gas valve and also the service port.
Hose with the valve pin
gauge manifold
pipe
pipe
VAC valve
Service port
Vacuum pump
Low pressure gauge
High pressure gauge
Gauge manifold kit
Fig.20
Note: For the large-sized unit, it has the service port for both the gas valve and the liquid valve.
During evacuation, it is available to connect two hoses of the manifold valve assembly to two
service ports to quicken the evacuating speed.
4.4.2 Additional Charge
ice ports to quicken the evacuating speed.
4.4.2 Additional Charge
Refrigerant suitable for a piping length of 5m is charged in the 09~42K outdoor unit at the
factory, and for 48~60K outdoor unit refrigerant is charged for a piping length of 7.5m.
When the piping of 09~42k unit is longer than 7.5m or the piping of 48~60k unit is longer than
9.5m, additional charging is necessary.
For the additional amount, see Table 9.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Table 9
Model
Item
Standard Pipe Length
Unnecessary Charge
Pipe Length
Additional Refrigerant Amount
for Extra Pipe
09~18K 5m ≤ 7.5m 30 g/m
24~42K 5m ≤ 7.5m 60 g/m
48~60K 7.5m ≤ 9.5m 60 g/m
When the height difference between the indoor unit and outdoor unit is larger than 10 meters,
an oil bend should be employed for every 6 meters.
Oil bend
Oil bend
Indoor
Outdoor
6m
Fig.21
4.5 Installation of the Drain Pipe
4.5.1 Precautions When Doing the Piping Work
(1). Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so
that air may not remain trapped inside the pipe.
(2). Keep pipe size equal to or greater than that of the connecting pipe.
(3). Install the drain piping as shown and take measures against condensation. Improperly
rigged piping could lead to leaks and eventually wet furniture and belongings.
Extension drain piping
(commercially available)
Insulating tube
(commercially
available)
Indoor unit
drain hose
Insulating tape
(accessory)
Fig.22
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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(4) Connect the drain hose.(Fig.23)
Drain hose must
slope downward.
Allow no trap to
form in the piping
Do not allow end
of hose to touch
water
Fig.23
4.5.2 Installing the Drain Pipes
(1). For determining the position of the drain hose, perform the following procedures.
(2). Insert the drain pipe to the drain outlet of the unit and then tighten the clamp securely with
tape. (Fig.24)
(3). Connect the extension drain pipe to the drain pipe and then tighten the clamp with tape.
1 2
3
1
2
Drain pan
Seal
Drain hose
≤ 4mm
Fig.24 Fig.25 Fig.26
Tighten the clamp until the screw head is less than 4 mm from the hose.(Fig.25)
① -
Metal clamp
② -
Drain hose
③ -
Grey tape
Insulate the pipe clamp and the drain hose using heat insulation sponge.(Fig.26)
① -
Metal clamp
② -
Insulation sponge
(4). When drain hose requires extension, obtain an extension hose commercially available.
(5). After connecting the local drain hose, tape the slits of the heat insulation tube.
(6). Connect the drain hose to the local drain pipe. Position the inter connecting wire in the
same direction as the piping.
4.5.3 Connecting the Drain Hose
(1). Connect the extension auxiliary pipe to the local piping.
(2). Prepare the local piping at the connection point for the drain pipe, as shown in the
installation drawings.
Note: Be sure to place the drain hose as shown in the diagram below, in a downward sloping
direction.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Drain pan
Drain hose
①
Right side piping
②
Bottom-right piping
Fig.27
4.5.4 Testing of Drain Piping
(1) After piping work is nished, check if drainage ows smoothly.
(2) As shown in the gure, pour water into the drain pan from the right side to check that water
ows smoothly from the drain hose.
Ceiling type Floor type
Fig.28
4.6 Electrical Wiring
4.6.1 Wiring Precautions
WARNING !
① .
Before obtaining access to terminals, all supply circuits must be disconnected.
② .
The rated voltage of the unit is as shown as Table 4 and Table 5
③ .
Before turning on, verify that the voltage is within the 198~264V range(for single phrase unit) or
342~457V range (for three-phrase unit).
④ .
Always use a special branch circuit and install a special receptacle to supply power to the air
conditioner.
⑤ .
Use a special branch circuit breaker and receptacle matched to the capacity of the air conditioner.
⑥ .
The special branch circuit breaker is installed in the permanent wiring. Always use a circuit that can
trip all the poles of the wiring and has an isolation distance of at least 3mm between the contacts of
each pole.
⑦ .
Perform wiring work in accordance with standards so that the air conditioner can be operated safely
and positively.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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⑧ .
Install a leakage special branch circuit breaker in accordance with the related laws and regulations
and electric company standards.
CAUTION !
① .
The power source capacity must be the sum of the air conditioner current and the current of other
electrical appliances. When the current contracted capacity is insufcient, change the contracted
capacity.
② .
When the voltage is low and the air conditioner is difcult to start, contact the power company to
raise the voltage.
4.6.2 Electrical Wiring
(1). For solid core wiring (Fig.29)
1). Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 25
mm (15/16") .
2). Using a screwdriver, remove the terminal screw(s) on the terminal board.
3). Using pliers, bend the solid wire to form a loop suitable for the terminal screw.
4). Shape the loop wire properly, place it on the terminal board and tighten securely with the
terminal screw using a screwdriver.
(2). For strand wiring (Fig.29)
1). Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 10
mm (3/8") .
2). Using a screwdriver, remove the terminal screw (s) on the terminal board.
3). Using a round terminal fastener or pliers, securely clamp a round terminal to each stripped
wire end.
4). Position the round terminal wire, and replace and tighten the terminal screw with a
screwdriver.(Fig.30)
Fig.29
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Fig.30 Fig.31
(3). How to x connection cord and power cord by cord clamp
After passing the connection cord and power cord through the insulation tube, fasten it with the
cord clamp.(Fig.31)
WARNING!
① .
Before starting work, check that power is not being supplied to the indoor unit and outdoor unit.
② .
Match the terminal block numbers and connection cord colors with those of the indoor unit side.
③ .
Erroneous wiring may cause burning of the electric parts.
④ .
Connect the connection cords rmly to the terminal block. Imperfect installation may cause a re.
⑤ .
Always fasten the outside covering of the connection cord with cord clamps. (If the insulator is not
clamped, electric leakage may occur.)
⑥ .
Always connect the ground wire.
(4). Electric wiring between the indoor and outdoor units
Single-phase units(09K~30K)
CH-IU09NK4+CH-IF09NK4 CH-IU12NK4 +CHIF12NK4 CH-IU18NK4+CH-IF18NK4
① .
Power cord 3×1.5mm
2
(H07RN-F)
② .
Power cord 3×1.0mm2(H05RN-F)
③ .
Communication Cords 2×0.75mm
2
(H05RN-F)
CH-IU24NK4+CH-IF24NK4 GCH-IU30NK4+CH-
IF30NK4
① .
Power cord 3×2.5mm2(H07RN-F)
② .
Power cord 3×1.0mm2(H05RN-F)
③ .
Communication Cords 2×0.75mm2(H05RN-F)
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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Single-phase units(36K~48K)
CH-IU36NK4+CH-IF36NK4 CH-IU42NK4+CHIF42NK4
① .
Power cord 3×2.5mm2(H07RN-F)
② .
Power cord 3×1.0mm2(H05RN-F)
③ .
Communication Cords 2×0.75mm
2
(H05RN-F)
CH-IU48NK4+CH-IF48NK4
① .
Power cord 3×6.0mm2(H07RN-F)
② .
Power cord 3×1.0mm2(H05RN-F)
③ .
Communication Cords 2×0.75mm2(H05RN-F)
Three-phase units
CH-IU36NM4+CH-IF36NK4
CH-IU42NM4+CH-IF42NK4
CH-IU48NM4+CH-IF48NK4
CH-IU60NM4+CH-IF60NK4
① .
Power cord 5×1.5mm
2
(H07RN-F)
② .
Power cord 3×1.0mm2(H05RN-F)
③ .
Communication Cords 2×0.75mm
2
(H05RN-F)
Fig.32
(5). Electric wiring of indoor unit side
Remove the left cover plate and the electric box cover then insert the end of the communication
cord and the power cable into the terminal board.
Fig.33
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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CAUTION!
① .
The power cord and the wire of the fresh air valve are high-voltage, while the communication cord
and connection wire of the wired controller are low-voltage. They should run separately against
electromagnetic interference.
② .
The high-voltage and low-voltage lines should pass through the rubber rings at different electric box
covers.
③ .
Do not bundle the connection wire of the wired controller and the communication cord together, or
arrange them in parallel, otherwise improper operation would occur.
④ .
The high-voltage and low-voltage lines should be xed separately and securely, with internal big
clamps for the former and small clamps for the latter.
⑤ .
Tighten the indoor/outdoor connection cord and power cord respectively on the terminal boards with
screws. Faulty connection may cause a re.
⑥ .
If the indoor unit connection cord (to the outdoor unit) and power supply are wired incorrectly, the air
conditioner may be damaged.
⑦ .
Connect the indoor unit connection cord properly based on the corresponding marks as shown in
Fig. 32.
⑧ .
Ground both the indoor and outdoor units by attaching a ground wire.
⑨ .
Unit shall be grounded in compliance with the applicable local and national codes.
(6). Electric wiring of outdoor unit side
Note: When connecting the power supply cord, make sure that the phase of the power supply
matches with the exact terminal board. If not, the compressor will rotate reversely and run
improperly.
Remove the big handle(09~42K) /front board(48/60K) of the outdoor unit and insert the end of
the communication cord and the power cable into the terminal board.
Single phase:
09K~12K
18K~30K
36K~48K
Fig.34
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Power lines should go along the right side plate and
be fixed to the fixation hook with binding wires to keep
no contact with pipelines. Communication lines between
indoor and outdoor units also should go along the right side
plate and keep away from power lines.
Routing of
External
Power Lines
Fig.36
Three-phase:
36K~60K
L1 L2 L3 N
1
2
Fig.35
5 Installation of Controllers
Refer to the Installation Manual of the controller for more details.
6 Test Running
6.1 Trial Operation and Testing
(1). The meaning of error codes as shown below:
Table 10
Number Error code Error Remarks
1 E1 Compressor high pressure protection
2 E2 Indoor anti-freeze protection
3 E3
Compressor low pressure protection, refrigerant lack
protection and refrigerant colleting mode
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4 E4 Compressor high discharge temperature protection
5 E6 Communication error
6 E8 Indoor fan motor error
7 E9 Full water protection
8 F0 Indoor ambient temperature sensor error
9 F1 Evaporator temperature sensor error
10 F2 Condenser temperature sensor error
11 F3 Outdoor ambient temperature sensor error
12 F4 Discharge temperature sensor error
13 F5 Temperature sensor error of wired controller
15 C5 Capacity code error
16 EE Outdoor memory chip error
17 PF Electric box sensor error
18 H3 Compressor overload protection
19 H4 Overloading
20 H5 IPM protection
21 H6 DC fan motor error
22 H7 Drive desynchronizing protection
23 Hc Pfc protection
25 Lc Activation failure
26 Ld Compressor phase sequence protection
27 LE Compressor stalling protection
28 LF Power protection
29 Lp Indoor and outdoor mismatch
30 U7 4-way valve direction changing protection
31 P0 Drive reset protection
32 P5 Over-current protection
33 P6 Communication error between main control and drive
34 P7 Drive module sensor error
35 P8 Drive module over temperature protection
36 P9 Zero passage protection
37 PA AC current protection
38 Pc Drive current error
39 Pd Sensor connecting protection
40 PE Temperature drift protection
41 PL Bus low voltage protection
42 PH Bus high voltage protection
43 PU Charge loop error
44 PP Input voltage abnormality
45 ee Drive memory chip error
Note: When the unit is connected with the wired controller, the error code will be simultaneously
shown on it.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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(2). Instructions to the Error Indicating Lamps on the Panel of the Floor Ceiling Type Unit.
States of the Indicating Lamps:
① .
Indicating Lamp of “POWER”: The indicating lamp will
shine when power on, while it will go out when power off.
② .
Indicating Lamp of “COOL” :
The indicating lamp will shine when “COOL” is activated,
while it will go out when “COOL” is deactivated.
③ .
Indicating Lamp of “HEAT”:
The indicating lamp will shine when “HEAT” is activated,
while it will go out when “HEAT” is deactivated.
④ .
Indicating Lamp of “TIMER”:
The indicating lamp will shine when “TIMER” is activated,
while it will go out when “TIMER” is deactivated or the set.
①
②
④
③
Fig.37
6.2 Working Temperature Range
Table 11
Test Condition
Indoor Side Outdoor Side
DB(°C) WB(°C) DB(°C) WB(°C)
Nominal Cooling 27 19 35 24
Nominal Heating 20
−
7 6
Rated Cooling 32 23 48
−
Low Temp. Cooling 21 15 -15
−
Rated Heating 27
−
24 18
Low Temp. Heating 20
−
-10 -11
Note:
① .
The design of this unit conforms to the requirements of EN14511 standard.
② .
The air volume is measured at the relevant standard external static pressure.
③ .
Cooling (heating) capacity stated above is measured under nominal working conditions
corresponding to standard external static pressure. The parameters are subject to change with
the improvement of products, in which case the values on nameplate shall prevail.
④ .
In this table, there are two outside DB values under the low temp cooling conditions, and the
one in the brackets is for the unit which can operate at extreme low temperature.
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7. Troubleshooting and Maintenance
7.1 Troubleshooting
If your air-conditioning unit suffers from abnormal operation or failure, please rst check the
following points before repair:
Table 12
Failure Possible Reasons
The unit cannot be started.
① .
The power supply is not connected.
② .
Electrical leakage of air-conditioning unit causes tripping of the leakage
switch.
③ .
The operating keys are locked.
④ .
The control loop has failure.
The unit operates for a
while
and then stops.
① .
There is obstacle in front of the condenser.
② .
The control loop is abnormal.
③ .
Cooling operation is selected when the outdoor ambient temperature is
above 48°C.
Poor cooling effect.
① .
The air lter is dirty or blocked.
② .
There is heat source or too many people inside the room.
③ .
The door or window is open.
④ .
There is obstacle at the air intake or outlet.
⑤ .
The set temperature is too high.
⑥ .
There is refrigerant leakage.
⑦ .
The performance of room temperature sensor becomes worse
Poor heating effect
① .
The air lter is dirty or blocked.
② .
The door or window is not rmly closed.
③ .
The set room temperature is too low.
④ .
There is refrigerant leakage.
⑤ .
The outdoor ambient temperature is very low.
⑥ .
Control loop is abnormal.
Note: After carrying out the check of the above items and taking relevant measures to solve the
problems found but the air-conditioning unit still does not function well, please stop the operation
of the unit immediately and contact the local service agency designated by C&H. Only ask
professional serviceman to check and repair the unit.
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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7.2 Routine Maintenance
WARNING !
① .
Do turn off the unit and cut off the main power supply when cleaning the air conditioner, otherwise
electric shock may happen.
② .
Do not make the air conditioner wet or electric shock may be lead; Ensure that the air conditioner
will not be cleaned by water rinsing under any circumstance.
③ .
Volatile liquid like thinner or gasoline would damage the appearance of air conditioner. (So, only soft
dry cloth and wet cloth moistened by neutral cleaning uid could be used to clean the surface panel
of air conditioner.)
(1). Disassembly method of lter screen and electric box cover
1. Open the air inlet grille
① .
Firstly unx two buckles on the grille as shown
on the picture.
② .
Remove the screws under the buckles by a
screwdriver and then open the inlet grille.
Remove the screw
2. Clean the ler screen
Clean the filer screen by a vacuum cleaner or
wash it by ashing water. If the oil stain on the lter
can not be removed or cleaned up, wash it by warm
water meld with the detergent. Dry the filer in the
shadow.
Note:
① .
Never use hot water over 45°C in case of color
fading or turning yellow.
② .
Never dry it by fire so as to prevent the filter
caught re or deformation.
3. Disassemble the left and right side board
① .
After the grille is removed, use a screwdriver to
remove the screws shown on the picture.
② .
Push the side plate as per the arrowed direction
and take it down.
Remove the screw
4. Disassemble the right side board Disassembly method of right side board Step 3
C&H NORDIC COMMERCIAL 4 Floor Ceiling Type Unit
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5. Disassemble the electric box cover
After the right side board is removed, the electric
box cover will be shown up and disassemble the
xed screws on it.
(2). At the Start of the Seasonal Use
1) Check if there is blockage at the inlet or outlet vent of air conditioner.
2) Check if the earth wire has been attached reliably by the skilled serviceman.
3) Check if the exhausted batteries of the wireless controller have been replaced.
4) Check if the air lter had been installed well by professional.
Keep the power switch “On” 8 hours before the startup of the unit which has not been used for
a long period.
Note: all above should be operated by the skilled serviceman.
(3). At the End of the Seasonal Use
1) Cut off the power supply main switch
2) Clean the air lters and other parts by the skilled serviceman.
3) Leave the fan running for 2-3 hours to dry the inside of the unit.
Note: all above should be operated by the skilled serviceman.
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